<template>
  <div class="breadcrumb">
    <!-- <img class="menu_icon"  src="../../../static/images/icons/menu.png" alt=""> -->
    <span v-if="(levelList.length-1) && levelList[levelList.length-1]" class="page-title">{{levelList[levelList.length-1].meta.title}}</span>
    <el-breadcrumb class="app-breadcrumb" separator="—">
      <transition-group name="breadcrumb">
        <el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path">
          <span v-if="item.redirect==='noRedirect'||index==levelList.length-1" class="no-redirect">{{ item.meta.title }}</span>
          <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
        </el-breadcrumb-item>
      </transition-group>
    </el-breadcrumb>
  </div>

</template>

<script>
import pathToRegexp from 'path-to-regexp'

export default {
  data() {
    return {
      levelList: null
    }
  },
  watch: {
    $route() {
      this.getBreadcrumb()
    }
  },
  created() {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb() {
      // only show routes with meta.title
      var matched = this.$route.matched.filter(item => item.meta && item.meta.title)
      const first = matched[0]

      if (!this.isDashboard(first)) {
        matched = [{ path: '/', meta: { title: '当前位置' }}].concat(matched)
      }

      this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
    },
    isDashboard(route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === '当前位置'
    },
    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    // handleLink(item) {
    //   const { redirect, path } = item
    //   if (redirect) {
    //     this.$router.push(redirect)
    //     return
    //   }
    //   this.$router.push(this.pathCompile(path))
    // }
  }
}
</script>

<style lang="scss" scoped>
  .breadcrumb{
    height: 50px;
    line-height: 50px;
    overflow: hidden;
    // display: flex;
    // align-items: center;
    .menu_icon{
      width: 21px;
      height: 21px;
    }
  }
  .page-title{
    margin:0 15px;
    font-size:18px;
    font-weight: 600;
    color:rgba(0,0,0,0.8);
    font-family: "Microsoft YaHei UI Light",Georgia,Serif;
    float: left;
  }
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 50px;
  margin-left: 8px;
  .no-redirect {
    // color: #97a8be;
    color: #37B7FF;
    cursor: text;
  }
  /deep/ .el-breadcrumb__separator{
    color: #37B7FF!important;
  }
}
</style>
